org.apache.solr.common.params
Interface SpellingParams


public interface SpellingParams

Parameters used for spellchecking

Since:
solr 1.3

Field Summary
static String SPELLCHECK_ACCURACY
          Certain spelling implementations may allow for an accuracy setting.
static String SPELLCHECK_ALTERNATIVE_TERM_COUNT
          The count of suggestions to return for each query term existing in the index and/or dictionary.
static String SPELLCHECK_BUILD
          Whether to build the index or not.
static String SPELLCHECK_COLLATE
          Take the top suggestion for each token and create a new query from it
static String SPELLCHECK_COLLATE_EXTENDED_RESULTS
           Whether to use the Extended Results Format for collations.
static String SPELLCHECK_COLLATE_MAX_COLLECT_DOCS
           For use with SPELLCHECK_MAX_COLLATION_TRIES and SPELLCHECK_COLLATE_EXTENDED_RESULTS.
static String SPELLCHECK_COLLATE_PARAM_OVERRIDE
           For use with SPELLCHECK_MAX_COLLATION_TRIES, use this to override any original query parameters when issuing test queries.
static String SPELLCHECK_COUNT
          The count of suggestions to return for each query term not in the index and/or dictionary.
static String SPELLCHECK_DICT
          The name of the dictionary to be used for giving the suggestion for a request.
static String SPELLCHECK_EXTENDED_RESULTS
          Whether to use the extended response format, which is more complicated but richer.
static String SPELLCHECK_MAX_COLLATION_EVALUATIONS
           The maximum number of word correction combinations to rank and evaluate prior to deciding which collation candidates to test against the index.
static String SPELLCHECK_MAX_COLLATION_TRIES
           The maximum number of collations to test by querying against the index.
static String SPELLCHECK_MAX_COLLATIONS
           The maximum number of collations to return.
static String SPELLCHECK_MAX_RESULTS_FOR_SUGGEST
           The maximum number of hits the request can return in order to both generate spelling suggestions and set the "correctlySpelled" element to "false".
static String SPELLCHECK_ONLY_MORE_POPULAR
          When this parameter is set to true and the misspelled word exists in the user field, only words that occur more frequently in the Solr field than the one given will be returned.
static String SPELLCHECK_PREFIX
           
static String SPELLCHECK_Q
          Use the value for this parameter as the query to spell check.
static String SPELLCHECK_RELOAD
          Whether to reload the index.
 

Field Detail

SPELLCHECK_PREFIX

static final String SPELLCHECK_PREFIX
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Constant Field Values

SPELLCHECK_DICT

static final String SPELLCHECK_DICT
The name of the dictionary to be used for giving the suggestion for a request. The value for this parameter is configured in solrconfig.xml

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Constant Field Values

SPELLCHECK_COUNT

static final String SPELLCHECK_COUNT
The count of suggestions to return for each query term not in the index and/or dictionary.

If this parameter is absent in the request then only one suggestion is returned. If it is more than one then a maximum of given suggestions are returned for each token in the query.

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Constant Field Values

SPELLCHECK_ALTERNATIVE_TERM_COUNT

static final String SPELLCHECK_ALTERNATIVE_TERM_COUNT
The count of suggestions to return for each query term existing in the index and/or dictionary.

If this parameter is absent in the request then no suggestions are generated. This parameter allows for receiving alternative terms to use in context-sensitive spelling corrections.

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Constant Field Values

SPELLCHECK_MAX_RESULTS_FOR_SUGGEST

static final String SPELLCHECK_MAX_RESULTS_FOR_SUGGEST

The maximum number of hits the request can return in order to both generate spelling suggestions and set the "correctlySpelled" element to "false". Note that this parameter is typically of use only in conjunction with "spellcheck.alternativeTermCount".

If left unspecified, the default behavior will prevail. That is, "correctlySpelled" will be false and suggestions will be returned only if one or more of the query terms are absent from the dictionary and/or index. If set to zero, the "correctlySpelled" flag will be false only if the response returns zero hits. If set to a value greater than zero, suggestions will be returned even if hits are returned (up to the specified number). This number also will serve as the threshold in determining the value of "correctlySpelled". Specifying a value greater than zero is useful for creating "did-you-mean" suggestions for queries that return a low number of hits.

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Constant Field Values

SPELLCHECK_ONLY_MORE_POPULAR

static final String SPELLCHECK_ONLY_MORE_POPULAR
When this parameter is set to true and the misspelled word exists in the user field, only words that occur more frequently in the Solr field than the one given will be returned. The default value is false.

This is applicable only for dictionaries built from Solr fields.

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Constant Field Values

SPELLCHECK_EXTENDED_RESULTS

static final String SPELLCHECK_EXTENDED_RESULTS
Whether to use the extended response format, which is more complicated but richer. Returns the document frequency for each suggestion and returns one suggestion block for each term in the query string. Default is false.

This is applicable only for dictionaries built from Solr fields.

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Constant Field Values

SPELLCHECK_Q

static final String SPELLCHECK_Q
Use the value for this parameter as the query to spell check.

This parameter is optional. If absent, then the q parameter is used.

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Constant Field Values

SPELLCHECK_BUILD

static final String SPELLCHECK_BUILD
Whether to build the index or not. Optional and false by default.

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Constant Field Values

SPELLCHECK_RELOAD

static final String SPELLCHECK_RELOAD
Whether to reload the index. Optional and false by default.

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Constant Field Values

SPELLCHECK_COLLATE

static final String SPELLCHECK_COLLATE
Take the top suggestion for each token and create a new query from it

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Constant Field Values

SPELLCHECK_MAX_COLLATIONS

static final String SPELLCHECK_MAX_COLLATIONS

The maximum number of collations to return. Default=1. Ignored if "spellcheck.collate" is false.

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Constant Field Values

SPELLCHECK_MAX_COLLATION_TRIES

static final String SPELLCHECK_MAX_COLLATION_TRIES

The maximum number of collations to test by querying against the index. When testing, the collation is substituted for the original query's "q" param. Any "qf"s are retained. If this is set to zero, does not test for hits before returning collations (returned collations may result in zero hits). Default=0. Ignored of "spellcheck.collate" is false.

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Constant Field Values

SPELLCHECK_MAX_COLLATION_EVALUATIONS

static final String SPELLCHECK_MAX_COLLATION_EVALUATIONS

The maximum number of word correction combinations to rank and evaluate prior to deciding which collation candidates to test against the index. This is a performance safety-net in cases a user enters a query with many misspelled words. The default is 10,000 combinations.

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Constant Field Values

SPELLCHECK_COLLATE_MAX_COLLECT_DOCS

static final String SPELLCHECK_COLLATE_MAX_COLLECT_DOCS

For use with SPELLCHECK_MAX_COLLATION_TRIES and SPELLCHECK_COLLATE_EXTENDED_RESULTS. A performance optimization in cases where the exact number of hits a collation would return is not needed. Specify "0" to return the exact # of hits, otherwise give the maximum documents Lucene should collect with which to base an estimate. The higher the value the more likely the estimates will be accurate (at expense of performance).

The default is 0 (report exact hit-counts) when SPELLCHECK_COLLATE_EXTENDED_RESULTS is TRUE. When SPELLCHECK_COLLATE_EXTENDED_RESULTS is FALSE, this optimization is always performed.

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Constant Field Values

SPELLCHECK_COLLATE_EXTENDED_RESULTS

static final String SPELLCHECK_COLLATE_EXTENDED_RESULTS

Whether to use the Extended Results Format for collations. Includes "before>after" pairs to easily allow clients to generate messages like "no results for PORK. did you mean POLK?" Also indicates the # of hits each collation will return on re-query. Default=false, which retains 1.4-compatible output.

Note: that if SPELLCHECK_COLLATE_MAX_COLLECT_DOCS is set to a value greater than 0, then the hit counts returned by this will be estimated.

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Constant Field Values

SPELLCHECK_COLLATE_PARAM_OVERRIDE

static final String SPELLCHECK_COLLATE_PARAM_OVERRIDE

For use with SPELLCHECK_MAX_COLLATION_TRIES, use this to override any original query parameters when issuing test queries. For instance, if the original query has "mm=1" but it is preferred to test collations with "mm=100%", then use "spellcheck.collateParam.mm=100%".

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Constant Field Values

SPELLCHECK_ACCURACY

static final String SPELLCHECK_ACCURACY
Certain spelling implementations may allow for an accuracy setting.

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Constant Field Values


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